Hi
A phono cable shall have an additional GND wire with a spade, to connect to a screw on the Amp's side. Ordinary RCA to RCA may have the hum noise problem you say you have.
The extra GND wire is essential.
A phono cable shall have an additional GND wire with a spade, to connect to a screw on the Amp's side. Ordinary RCA to RCA may have the hum noise problem you say you have.
The extra GND wire is essential.